13B-160
MR-372-J84-13B200$360.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF1070
PRESENT
OR
STOREDCOLD LOOP
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present with the engine running and a heating and air
conditioning request
Priorities when dealing with a number of faults:
Firstly, deal with the following faults:
–DF049 Refrigerant sensor circuit, if it is present or stored.
When the fault is present or stored, the heating and air conditioning system is inhibited.
Check fuse F22 (10A) of the UPC and the condition of the air conditioning compressor connector.
If the connectors is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the air conditioning compressor wiring.
If the wiring is faulty and there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Manually check if the compressor is jammed (turn the clutch plate manually to check that there is no point of
resistance). In the event of sticking, replace the air conditioning compressor (see MR 364 (Mégane II) or 370
(Scénic II), Mechanical, Heating and air conditioning system, 62A, Air conditioning, Compressor:
Removal – Refitting).
Top up with refrigerant, check for any leaks and repair if necessary (see MR 364 (Mégane II) or 370 (Scénic II),
Mechanical, Heating and air conditioning system, 62A, Air conditioning, Refrigerant circuit: check,
Refrigerant circuit: Draining – Filling).
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF1070/EDC16_V58_DF1070/EDC16_V5C_DF1070/EDC16_V18_DF1070/EDC16_V1C_DF1070/EDC16_V20_DF1070
13B-165
MR-372-J84-13B200$504.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of statuses
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
ET001
CONTINUED
Sensor electrical conformity
"ABSENT"
NOTESIgnition on
Check the condition and the conformity of the supply fuse F5D (5A) of the Protection and Switching Unit
(Vdiag 18, 1C, 20 only).
Repair if necessary
Check for an earth on connection NT (Laguna II) or N (Mégane II and Scénic II) of component 120.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for a + 12 V feed on connection AP29 (Laguna II) or AP15 (Mégane II and Scénic II) of the injection
computer.
If there is no voltage, check the continuity and insulation from earth of connection AP29 (Laguna II) or AP15
(Mégane II and Scénic II) between components 120 and 1337 (Vdiag 18, 1C, 20 only) or 597 (Vdiag 50, 58, 5C
only).
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
PRESENT
NOTESIgnition on
Check that there is no + 12 V feed with the ignition off on connection AP29 (Laguna II) or AP15 (Mégane II and
Scénic II) of component 120.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
13B-167
MR-372-J84-13B200$504.mif
V13
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5CDIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET004
AC AUTHORISED
STATUS DEFINITIONYES, this status indicates that the air conditioning is active.
NO, this status indicates that the air conditioning is inactive.
NOTESSpecial notes
Only perform these tests if the statuses do not correspond with the system
programming functions.
Engine running, engine coolant temperature > 80 °C
YES
The air conditioning authorisation only changes to YES if:
– the air conditioning request has been made by the driver (air conditioning switch in
AC or AUTO position with minimum ventilation),
– the engine is not under full load,
– the air conditioning system is not faulty.
Conformity check with engine stopped and ignition on
NOStatus ET004 remains NO under the following conditions:
– Vehicle stopped with the ignition on,
– faults present in the air conditioning circuit,
– no air conditioning request made by the driver,
– engine under full load.
If status ET004 remains NO then the air conditioning should be authorised, check:
– that the air conditioning compressor is activated correctly,
– the air conditioning system feed fuses,
– the presence of refrigerant in the air conditioning circuit,
– that the refrigerant fluid pressure value is consistent at idle speed.
If the fault is still present, check the air conditioning computer faults (see62C, Air
conditioning).
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16_V50_ET004/EDC16_V58_ET004/EDC16-V5C_ET004/EDC16_V18_ET004/EDC16_V1C_ET004/EDC16-V20_ET004
13B-168
MR-372-J84-13B200$504.mif
V13
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5CDIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET007
PRE-POSTHEATING UNIT CONTROL
STATUS DEFINITIONACTIVE, when the heater plugs are activated according to the engine coolant
temperature.
INACTIVE, after the engine has been running for a certain period.
In the event of a fault, consult the interpretation of fault DF017 Preheating unit
control circuit.
NOTESSpecial notes:
Only perform these tests if the statuses do not correspond with the system
programming functions.
Conformity check with engine running, engine coolant temperature > 80 °C
"ACTIVE"
Then
"INACTIVE"
After the engine has been running for a certain period, the status changes from ACTIVE
to INACTIVE.
In the event of a fault, consult the interpretation of fault DF017 Preheating unit control
circuit.
Sensor conformity check
ACTIVEWhen the vehicle is started from cold, the injection computer controls the pre-
postheating unit so that the vehicle can be started.
Status ET007 becomes YES a few seconds after the ignition is switched on and during
pre/postheating.
If the vehicle does not start and status ET007 becomes YES, check:
– supply fuse F2 (Scénic II and Mégane II) or FM12 (Laguna II) (70A) for the
preheating unit, located on the power supply fuse board in the engine compartment
connection unit, below the Protection and Switching Unit,
– the resistance of the heater plugs.
Replace any plug with a resistance greater than 2Ω.
If the vehicle starts and status ET007 remains YES during the engine operating phase,
refer to the interpretation of faults:
– DF017 Preheating relay control circuit.
– DF025 Pre-postheating unit diagnostic connection.
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16_V50_ET007/EDC16_V58_ET007/EDC16_V5C_ET007/EDC16_V18_ET007/EDC16_V1C_ET007/EDC16-V20_ET007
13B-189
MR-372-J84-13B200$504.mif
V13
13B
DIESEL INJECTION
Fault finding – Interpretation of statuses
ET143
LOW-SPEED FAN ASSEMBLY RELAY CONTROL
STATUS DEFINITIONACTVE: This status indicates that the low-speed fan assembly relay is actuated.
INACTIVE: This status indicates that the low-speed fan assembly relay is not actuated.
NOTESIf the vehicle is fitted with air conditioning, the fan assembly electrical circuit contains
2 relays. The fan assembly speed 1 relay will be actuated when the engine coolant
temperature exceeds 96° and will be dedicated to cooling the engine as long as the
engine coolant temperature does not exceed 99°.
If the engine coolant temperature exceeds 99°, fan assembly speed 2 relay will be
actuated and the engine cooling fan will run more quickly.
ACTIVE
When the coolant reaches 96°C, the diesel computer actuates the low-speed fan
assembly relay and status ET143 becomes ACTIVE.
The relay then supplies the fan assembly and the cooling fan begins to turn.
Run command AC038 Low-speed fan unit relay and check visually that the cooling
fan is turning.
If this is not the case, carry out the following operations:
– check the condition of fuse FM15 (60A) and the motor relay R09,
– disconnect the low-speed and high-speed relays, check their operation and the
condition of the connections.
– repair if necessary,
– check for a + 12 V on connection 3FB of the low speed relay when it is actuated
then check the continuity and the absence of interference resistance on connection
3JN between components 120 and 597.
If the connection or connections are faulty and there is a repair method (see Technical
Note 6015A, Repairing electrical wiring, Wiring: Precautions for repair), repair the
wiring, otherwise replace it.
INACTIVEIf the engine temperature is less than 96°C, the engine cooling fan cannot switch on
and the low-speed fan assembly relay cannot be actuated.
Sta tus ET143 becomes INACTIVE when the control relay and the engine cooling fan
are not supplied.
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16_V18_ET143/EDC16_V1C_ET143/EDC16_V20_ET143EDC16
Program No: C1
Vdiag No: 18, 1C, 20
13B-190
MR-372-J84-13B200$504.mif
V13
EDC16
Program No: C1
Vdiag No: 18, 1C, 20DIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET144
HIGH-SPEED FAN ASSEMBLY RELAY CONTROL
STATUS DEFINITIONACTIVE: This status indicates that the high-speed fan assembly relay is actuated.
INACTIVE: This status indicates that the high-speed fan assembly relay is not
actuated.
ACTIVE
When the coolant reaches 99°C, the diesel computer activates the high-speed fan
assembly relay and status ET144 becomes ACTIVE.
The relay then supplies the fan assembly and the cooling fan begins to turn.
Run command AC039 High-speed fan unit relay and visually check that the cooling
fan is turning. If this is not the case, carry out the following operations:
– check the condition of fuse FM15 (60A) and the motor relay R10,
– disconnect the fan unit relays, check their operation and the condition of the
connections,
– repair if necessary,
– check for a + 12 V on connection 49B of components 597 and 262, when the high-
speed relay is actuated.
Check the continuity and the absence of interference resistance on the following
connections:
–Connection codes 3JP and 49B between components 120, 957 and 262.
If the connection or connections are faulty and there is a repair method (see Technical
Note 6015A, Repairing electrical wiring, Wiring: Precautions for repair), repair the
wiring, otherwise replace it.
INACTIVEIf the engine temperature is less than 99°C, the engine cooling fan cannot switch on
and the high-speed fan assembly relay should not be actuated.
Status ET144 becomes INACTIVE when the control relay and the engine cooling fan
are not supplied.
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16_V18_ET144/EDC16_V1C_ET144/EDC16_V20_ET144
13B-205
MR-372-J84-13B200$540.mif
V13
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5CDIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET704
ET705
BRAKE SWITCH NO. 1
BRAKE SWITCH NO. 2
NOTESSpecial note:
Statuses ET704 and ET705 should change status at the same time. In the event of
inconsistency, consult the interpretation of fault DF050 Brake switch circuit.
ACTIVE
or
INACTIVE
If the brake lights are working:
check the continuity and make sure there is no interference resistance on the following
connection:
Connection code 5A between components 160 and 120/645/119.
If there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Repair precautions), repair the wiring, otherwise replace it.
If the brake lights are not operational, check:
– the condition and fitting of the brake switch,
– the condition and conformity of the brake lights fuse,
– the conformity of the values in the following table:
disconnect the switch and carry out the following checks:
for Mégane II and Scénic II with ESP
Continuity between
connectionsInsulation between
connections
Switch pressed
(Brake pedal released)5A and BPT 65G and SP17
Switch released
(Brake pedal depressed)65G and SP17 5A and BPT
for Mégane II and Scénic II without ESP:
Continuity between
connectionsInsulation between
connections
Switch pressed
(Brake pedal released)5A and BPT 65A and SP17
Switch released
(Brake pedal depressed)65A and SP17 5A and BPT
For Laguna II:
Continuity between
connectionsInsulation between
connections
Switch pressed
(Brake pedal released)5A and SP13 65A and AP10
Switch released
(Brake pedal depressed)65A and AP10 5A and SP13
Replace the switch if the values obtained are not correct
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16_V50_ET704/EDC16_V58_ET704/EDC16_V5C_ET704/EDC16_V50_ET705/EDC16_V58_ET705/EDC16_V5C_ET705/
EDC16_V18_ET704/EDC16_V1C_ET704/EDC16_V20_ET704/EDC16_V18_ET705/EDC16_V1C_ET705/EDC16_V20_ET705
13B-302
MR-372-J84-13B200$756.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of commands
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
AC001
PRE-POSTHEATING UNIT
NOTESThis command is only run if fault DF025 Preheating unit diagnostic line or DF017
Preheating unit control circuit is present or stored and if no other faults are present.
Refer to the Wiring Diagrams Technical Note for the vehicle to locate the fuses and
relays concerned.
Switch on the ignition and connect the diagnostic tool.
with the pre-postheating unit connected:
– connect the negative terminal of the voltmeter to connection 3FF of component 257,
– connect the positive terminal of the voltmeter to the + 12 V battery,
– run command AC001.
If the voltmeter does not indicate the battery voltage while the command is running (ten 1-second ON/OFF
cycles):
1- Check the condition of the preheating unit supply fuse F01 (70A).
Replace it if necessary.
2- Check the continuity and the absence of interference resistance of the following connections:
– connection code 3FF,
– connection code 3FY.
Between components 120 and 257.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Repair if necessary.
3- Check the connections on the preheating unit, heater plugs and injection computer.
Repair if necessary.
4- Measure the resistance of the heater plugs. If this resistance is greater than 2 Ω, replace the faulty plug(s).
5- Check the continuity and the absence of interference resistance between the following connections:
– connection code 37AB,
– connection code 37Z,
– connection code 37AC,
– connection code 37AA.
Between components 257, 680, 681, 682 and 683.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
6- Check for + 12 V on connectionBP35 of component257.
if the fault is still present, replace the preheating unit
EDC16_V50_AC001/EDC16_V58_AC001/EDC16_V5C_AC001/EDC16_V18_AC001/EDC16_V1C_AC001/EDC16_V20_AC001